The first task is to wipe off or cover up the Z, says Anatoly, 44, of the call sign infamously daubed on Russian hardware involved in the war in Ukraine. “We don’t want friendly fire later on.” Then the mechanics get to work. In a secret location in Ukraine, within a vast warehouse that could be mistaken for a tank graveyard, what was once Russian – Soviet, in many cases – is being turned Ukrainian. (snip) But for all the efforts of the Nato allies, it is Russia that is unwittingly, and yet by some margin, Ukraine’s biggest donor of...